The word(s) "skill" appears 2 time(s) in 2 verse(s) in Quran in Muhammad Pickthal translation.

(1) He said: Set me over the storehouses of the land. Lo! I am a skilled custodian.

(سورة يوسف, Yusuf, Chapter #12, Verse #55)
(Arabic, Transliteration, Urdu (Ahmed Ali), Urdu (Jalandhry), Farsi, Yusuf Ali, Shakir, Picthal, Mohsin Khan, French, Spanish, Indonesian, Malay, German, Bosnian, Russian, Dutch, Italian, Portuguese, Tafsir - Jalal ad-Din, Tafsir - King Fahad Quran Complex)

(2) Throw that which is in thy right hand! It will eat up that which they have made. Lo! that which they have made is but a wizard's artifice, and a wizard shall not be successful to whatever point (of skill) he may attain.

(سورة طه, Taa-Haa, Chapter #20, Verse #69)
(Arabic, Transliteration, Urdu (Ahmed Ali), Urdu (Jalandhry), Farsi, Yusuf Ali, Shakir, Picthal, Mohsin Khan, French, Spanish, Indonesian, Malay, German, Bosnian, Russian, Dutch, Italian, Portuguese, Tafsir - Jalal ad-Din, Tafsir - King Fahad Quran Complex)